click on link and redirect on same page

[hiren kagathara]

i have to create one site but i dont have idea how can i do this
my que. is click on menu button top of the homepage.
ex. login
then it redirect me on same page with login box.

please help me

[Luuk]

Javascript can be used to do that
see (i.e.): http://www.w3schools.com/jsref/event_onclick.asp
or search for javascript and onclick